20201210101 has 4 divisors (see below), whose sum is σ = 20202626304. Its totient is φ = 20199793900.

The previous prime is 20201210093. The next prime is 20201210111. The reversal of 20201210101 is 10101210202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20201210101 - 2³ = 20201210093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201210111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686485 + ... + 715306.

It is an arithmetic number, because the mean of its divisors is an integer number (5050656576).

Almost surely, 2^20201210101 is an apocalyptic number.

It is an amenable number.

20201210101 is a deficient number, since it is larger than the sum of its proper divisors (1416203).

20201210101 is a wasteful number, since it uses less digits than its factorization.

20201210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416202.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20201210101 its reverse (10101210202), we get a palindrome (30302420303).

It can be divided in two parts, 2020 and 1210101, that added together give a palindrome (1212121).

The spelling of 20201210101 in words is "twenty billion, two hundred one million, two hundred ten thousand, one hundred one".